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１引言 用荧光光度法测定地表面中有机物的总发光强度来判断地下石油的分布情况。作者通过对大西北某沙漠地区２０００多个样品（１．８ｍ深处的岩石或土壤）的荧光光谱分析。着重探讨了严重干扰样品荧光光谱测定的诸种因素，并寻找了消除其干扰因素的方法。本方法采用石油醚处
1 Introduction Fluorescence spectrophotometry is used to determine the total luminous intensity of organic matter on the ground surface to determine the distribution of underground petroleum. The authors analyzed fluorescence spectra of more than 2000 samples (rocks or soils at a depth of 1.8 m) in a desert area of the Greater Northwest. The factors that seriously interfere with the determination of fluorescence spectra of the samples are discussed, and the methods to eliminate the interference factors are also discussed. This method uses petroleum ether